Application Of Ground Penetrating Radar In Heavy Metal Pollution In Anhui Province

In recent years,with the development of social economy,soil heavy metal pollution is becoming increasingly serious.This thesis investigates and summarizes a variety of heavy metal detection methods,highlighting the advantages of GPR,such as non-destructive,efficient,high precision,anti-jamming,deep detection and so on.The application of geophysical method in heavy metal pollution detection has good practical significance.After investigating the relevant background information and research status,this thesis introduces the geophysical instrument ground penetrating radar and its basic principle and technical parameters.From the problems of technical difficulty and parameter selection in the practical application of GPR,it is shown that the establishment of different types of models for forward modeling and full study of their abnormal response characteristic curves are of great significance to the field investigation and the interpretation and processing of subsequent GPR data.In this thesis,gprmax3.0 software based on FDTD is used to carry out forward simulation experimental research on the established multi group heavy metal pollution leakage model,so as to explore the influence of the change of each model parameter on the forward simulation results.The results show that the larger the target is,the shallower the buried depth is,the higher the resolution is;The buried depth of the top of the target can be calculated according to the arrival time of the first reflected wave;The shape of the forward curve is similar to the contour of the object.Taking the survey project of a waste electroplating factory in Anhui Province as an example,the ground penetrating radar detection technology is applied to the detection of heavy metal pollution.Firstly,the geological survey of the study area is investigated,and then 85 radar lines are laid after the field survey of the study area.According to the work requirements,the data collection is completed,and then the measured data are processed and interpreted by the methods of channel equalization,band-pass filtering,moving average,etc.,and finally the suspicious pollution leakage area is delineated.Based on the actual project,the feasibility of GPR in heavy metal pollution detection is proved again by the mutual verification with the geochemical results.